Portable derrick



L. F. KLOEHN. PORTABLE DERRICK.

APPLICATION FILED NOV. I5. I920. v 1,402,074. Patented Jan. 3,1922

2 SHEETS-SHEET I.

Louis F. KLoEH N L. F. KLUEHN.

PORTABLE DERRICK. APPLICATION FILED Nov. I5. 1920.

2 SHEETS-SHEET 2.

:Jn/venirci LOUIS F. K LQEH N arbor nu;

barren srarss ears Serile.

EORTABLE DERRICK.'

alicante.

Speccation of Letters Patent.

' Patented Jaaa, i922.

Application led'November 15, 1920i Serial lia-424,111..

Y 10 all Iwhom t may concern:

Be it knownthat l, Lotus ii". limousin, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful improvements in Portable Derricks, of which the following is a specilication.

This invention relates to portable derricks and the main object is to provide a simple, efficient and practical derrick especially adapted for use in transporting crippled automobiles. Further objects will be disclosed in the course of the following specification and in the accompanying drawings, in which:

F ig. 1 is a side elevation of a derrick embodying my invention.

Fig. 2 is a sectional view on the line 2 2 in Figure 1, but showing the carriage in a more forward position on the main frame.

Fig. 3 is an enlarged view of the rear end of the machine, or as seen when looking from the right in Figure 1.

Referring to the drawings by reference numerals, i designates a main frame, supported at its rear end by suitable ground wheels 5, and adapted to be pivot-ally connected at its front end by a bolt 6 to the draw bar 7 of an automobile or truck by which the machine is to be drawn.

A supporting frame 8 is mounted to turn on a vertical pivot on the rear end of the frame et, and is provided with two saddles 9, in which may be secured by suitable straps or chains 10 either the front or rear axle 10d of the vehicle to be towed. 1t may be noted that supporting bars 11 of the frame 8 are bent downwardly and spread at their middle points 12, the object being to allow plenty of room for the differential casing of an being carried.

1n Order to conveniently lift the crippled end of the automobile up into the saddles 9 I provide a hoisting mechanism which l believe to be not only new and novel but far superior to any other device heretofore designed for accomplishing a similar purpose. A carriage 13, is provided with two sets of rollers 14 and 15 which travel on the side beams of the main frame 4, and extension 16 of the carriage are provided with rollers 17 adapted to engage under the beams and thus prevent the carriage from tipping when a car is being lifted.

At the upper end of the carriage 13 is secured a casing 18 in which is slidably mounted a beam having a pulley 2O in its outer end. A removable pin 21 is adapted to secure the beam 19 in any extended position desired. A second pulley 22, having a hoisting hook 23, is held suspended'in a chain 24, one end of which is secured at 25 to the beam 19, and the other end, after passing over the pulley 20, extends down to and is secured about a drum 26 journaled in the carriage 13. A gear 27 is lmade integral with or is secured to the drum 26, and is driven by aV worm 28 which in turn is rotated by a detachable hand crank 29.-

A chain 30 passing over 'pulleys 31, one in each end of the frame 4, has its ends secured to convenient places 32 on the carriage. vThe front pulley 31 (see Figure 2) is ixedon a shaft 33, which is journaled in the main frame, and which is squared at its end 34 to accommodate the crank 29, or a similar one. rThe shaft 83 is further provided with a gear or ratchet wheel 35, in the notches of which may engage a pivoted dog 36.

The operation and use of the machine may be described as follows: When either end of an automobile has been wrecked or otherwise damaged beyond temporary repair, and the derrick lhas been sent for, the wheel end of the machine is backed up against the damaged end of the car. The carriage is then, by means of turning the shaft 83, moved back as far as possible on the main frame, and the hook 23 is let down and secured to the car. By turning the drum 26, with the crank 29, the end of the automobile is then lifted up to the desired height. The crank is then applied to the shaft 33, the dog 36 is released, and the carriage 13 is moved forward until the axle automobile when the rear end of the same is 10EL is brought directly over the saddles 9. The hook 23 is then lowered and released, the chains 10 are secured, and the damaged car is towed away on two of its wheels.

rlhe sliding beam (19) construction makes the machine particularly desirable for use in and around garages. With this arrangement the pulley 20 may be extended far out beyond the end of the machine, thus making it possible to utilize the derrick for such purposes as lifting motors out of and placing them backinto motor cars, and for lifting and moving other heavy bodies from place to place. In this connection it may be found desirable to support the front end of the main frame on an auxiliary pair ot' detachable Wheels, but for the presentvdisclosure this is considered unimportant.

It is understood that this speciicationand the accompanying drawings are purely illus-` trative'of my inventionandshall-not be interpreted `in a'limitingl sense, but thatthe invention may also broadly" embody suit-able kmodifications in details and general construction, provided, however, thatsuch modifications comewithin the scope and spirit of the appended claims.

Having novvY therefore fully shown Yand de- Y scribed" my invention what I claim to be nsmmounted-injsad carriage.r i

2. A machine ofthe classdesciibed,con

sisting of a; suitaljily;v supported main frame, a supporting frame mounted to swingen a vertical Apivot at one end of the mainframe,

asaddlelmeinber at each endet said supporting iframe7 a carriage adapted to travel longitudinally on lthe main frame, and a hoisting mechanism mounted in said carriage. Y

o 3. A.- machine ofthe class described, consisting of a suitably supported main frame,

a supportingframe mounted yto svvingon a vertical 'pivot at one end of the main frame, a saddle `memberat each end of said supporting frame and means for detachably securing the i riage adapt-ed to travel Vlongitudinally on the main frame, and 'a'hoisting mechanism mounted in `said carriage. Y

axle of a motorV vehicle therein, alcar- LA machine of the Vclass eclescribed, cono sisting of' aV main frame, ground Wheels adapted to support the rear end of the `frame and means forY securing the front end of theY frame to the'di'awbar of a vehicle, afsupporting frame mounted kto swingy on a ver-l tical pivot at the rear end of the main trame,Y a carriageadapted to travel. on the main frame and means for'securing it in various longitudinal positions tliereoinf and a hoisting mechanism .pniount-ed in said carriage for 'the purpose of lifting the end of a crippled motor car uponto said supporting tranfie.v

In testimony whereof I affix mysignatuie.

o' LOUIS KLOEHN; 

